# Sentra not starting

**URL:** <https://community.cartalk.com/t/sentra-not-starting/85959>\
**Category:** Maintenance/Repairs\
**Created:** [July 12, 2014, 6:23pm UTC](https://community.cartalk.com/t/sentra-not-starting/85959 "2014-07-12T18:23:43Z")\
**Posts on this page:** 6\
**Page:** 1

<div class="post-metadata">

**Author:** ![painterdude](https://avatars.discourse-cdn.com/v4/letter/p/da6949/32.png) [@painterdude](https://community.cartalk.com/u/painterdude)\
**Post date:** [July 12, 2014, 6:23pm UTC](https://community.cartalk.com/t/sentra-not-starting/85959/1 "2014-07-12T18:23:43Z")

</div>

I have a 2000 Nissan sentra and I have times when I will drive for couple days and then it won’t start it will just crank over and over but won’t fire I have had it to several people but no answer replaced the fuel pump relay switch but nothing I need help

---

<div class="post-metadata">

**Author:** ![BustedKnuckles](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/bustedknuckles/32/25_2.png) [@BustedKnuckles](https://community.cartalk.com/u/BustedKnuckles)\
**Post date:** [July 12, 2014, 9:22pm UTC](https://community.cartalk.com/t/sentra-not-starting/85959/2 "2014-07-12T21:22:52Z")

</div>

Has anyone checked for engine trouble codes?

---

<div class="post-metadata">

**Author:** ![painterdude](https://avatars.discourse-cdn.com/v4/letter/p/da6949/32.png) [@painterdude](https://community.cartalk.com/u/painterdude)\
**Post date:** [July 12, 2014, 10:34pm UTC](https://community.cartalk.com/t/sentra-not-starting/85959/3 "2014-07-12T22:34:56Z")

</div>

Yes but nothing

---

<div class="post-metadata">

**Author:** ![Barkydog](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/barkydog/32/2470_2.png) [@Barkydog](https://community.cartalk.com/u/Barkydog)\
**Post date:** [July 12, 2014, 11:03pm UTC](https://community.cartalk.com/t/sentra-not-starting/85959/4 "2014-07-12T23:03:37Z")

</div>

It needs to be diagnosed in failure mode. If you can figure out how to replicate the problem on a consistent basis to have it analyzed in failure mode would be the best. Is the maintenance for fuel filter up to date? does it happen on damp or rainy days?

---

<div class="post-metadata">

**Author:** ![painterdude](https://avatars.discourse-cdn.com/v4/letter/p/da6949/32.png) [@painterdude](https://community.cartalk.com/u/painterdude)\
**Post date:** [July 13, 2014, 8:37am UTC](https://community.cartalk.com/t/sentra-not-starting/85959/5 "2014-07-13T08:37:29Z")

</div>

Just random times fuel pump and relay switch have been replaced

---

<div class="post-metadata">

**Author:** ![Tester](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tester/32/15976_2.png) [@Tester](https://community.cartalk.com/u/Tester)\
**Post date:** [July 13, 2014, 9:02am UTC](https://community.cartalk.com/t/sentra-not-starting/85959/6 "2014-07-13T09:02:53Z")

</div>

The problem might be with the crankshaft position sensor.

[http://www.rockauto.com/catalog/moreinfo.php?pk=2413230&cc=1429501](http://www.rockauto.com/catalog/moreinfo.php?pk=2413230&cc=1429501)

As you can see the thing is made of plastic.

If the computer doesn’t see a signal from this sensor, the computer see’s no reason to operate the ignition and the fuel injection system. So the engine doesn’t start

Tester